Title :
An Improved PAPR Reduction Algorithm in Cognitive Radio System
Author :
Wen-Jie Zhu ; Ben-Shun Yi ; Qiu-Ying Xie
Author_Institution :
Electron. Inf. Sch., Wuhan Univ., Wuhan, China
Abstract :
Non-continuous orthogonal frequency division multiplexing (NC-OFDM) is an effective data transmission technology in cognitive radio (CR) system with high frequency efficiency and anti selective channel fading property. But as with OFDM systems, NC-OFDM also owns large side lobe power and high peak-to-average power ratio (PAPR), which leads to spectrum leakage of licensed users (LUs) and distortion of signal amplification. In this paper, a joint optimization algorithm is proposed. Multi-choice sequence (MCS) for side lobe suppression and fountain codes for high PAPR reduction are adopted in the algorithm. The simulation results suggest that the new algorithm can reduce the side lobe power radiation and PAPR, finally enhance the overall performance of the system effectively.
Keywords :
OFDM modulation; codes; cognitive radio; fading channels; optimisation; radio spectrum management; CR system; LU; MCS; NC-OFDM system; PAPR; cognitive radio system; data transmission technology; fountain code; improved PAPR reduction algorithm; licensed user; multichoice sequence; noncontinuous orthogonal frequency division multiplexing; optimization algorithm; peak-to-average power ratio; selective channel fading property; sidelobe power radiation; sidelobe suppression; signal amplification distortion; Amplitude modulation; Cognitive radio; Encoding; Interference; Joints; Peak to average power ratio; NC-OFDM; PAPR; cognitive radio; fountain codes;
Conference_Titel :
Wireless Communication and Sensor Network (WCSN), 2014 International Conference on
Print_ISBN :
978-1-4799-7090-2
DOI :
10.1109/WCSN.2014.57
